The existing behaviour of go generate is to pass GOPACKAGE=p
to all package files, including XTest files. This however is
incorrect as the package name for the XTest files is p_test.

Fixes #24594

Change-Id: I96b6e5777ec511cdcf1a6267a43f4d8c544c4af3
Reviewed-on: https://go-review.googlesource.com/103415
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Mostly same as golang.org/cl/102156, except the parts that
deal with different data types.

Change-Id: I061b858b73898725e3bf175ed022c2e3e55fc485
Reviewed-on: https://go-review.googlesource.com/103158Reviewed-by: Andrew Bonventre <andybons@golang.org>

Using go test -c makes you responsible for managing and merging the
coverage profile yourself.

Fixes #24588

Change-Id: I2037a91ceb904f9f35d76c7b5e5fae6bcbed4e46
Reviewed-on: https://go-review.googlesource.com/103395
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: If56bd72917a9cbf5920ae8b5a36dc67f10959b94
Reviewed-on: https://go-review.googlesource.com/103175
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>

Decode AT_PAGESZ to determine physPageSize on dragonfly.

Change-Id: I7236d7cbe43433f16dffddad19c1655bc0c7f31d
Reviewed-on: https://go-review.googlesource.com/103257
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The escape_because.go test file (which tests the "because" escape
explainations printed by `-m -m`) cointains a machine-generated list
of all the escape reasons seen in the escape tests.

The list appears to be outdated; moreove a new escape reason was added
in CL 102895. This change re-generates the list.

Change-Id: Idc721c6bbfe9516895b5cf1e6d09b77deda5a3dd
Reviewed-on: https://go-review.googlesource.com/103375Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #23164

Change-Id: I6e8c6443f3ef91df71e117cce1cfa1faba647dd7
Reviewed-on: https://go-review.googlesource.com/87337Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

-race sets a hard cap of 8,192, which is easily hit while testing.

Fixes #23611

Change-Id: I0f720ec39c82c2194a485d437d6373f4bdc8a9c1
Reviewed-on: https://go-review.googlesource.com/103160Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I7c0716711a2cadd347fdf242c792b109539f7355
Reviewed-on: https://go-review.googlesource.com/103163Reviewed-by: Andrew Bonventre <andybons@golang.org>

Change-Id: Idf88d289bac9603d852a9d19eb4b764f8589f8d9
Reviewed-on: https://go-review.googlesource.com/103159Reviewed-by: Andrew Bonventre <andybons@golang.org>

Fixes #23264

Change-Id: Ib6c343dc8e32949c6de72cb628cace2e8fabc302
Reviewed-on: https://go-review.googlesource.com/103236
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

In general use of these magic methods must be documented so that
users understand what will happen.

Fixes #23289

Change-Id: Ic46915eee1d3b7e57d8d1886834ddfb2e8e66e62
Reviewed-on: https://go-review.googlesource.com/103238Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I8f12b188d2e13555e1d7634b9cc0319fc737cb1d
Reviewed-on: https://go-review.googlesource.com/103216Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ibba5d4fd8124db9b1e4e50b8f37366f8dd23f47e
Reviewed-on: https://go-review.googlesource.com/103217Reviewed-by: Ian Lance Taylor <iant@golang.org>

A very small number of old browsers consider content as HTML
even when it is explicitly stated in the Content-Type header
that it is not. If content served is based on user-supplied
input, then an XSS is possible. Introduce three mitigations:

+ Don't reflect user input in error strings
+ Set a Content-Disposition header when requesting a resource
  that should never be displayed in a browser window
+ Set X-Content-Type-Options: nosniff on all responses

Change-Id: I81c9d6736e0439ebd1db99cd7fb701cc56d24805
Reviewed-on: https://go-review.googlesource.com/102318
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #24225

Change-Id: I876ac1b9d3615283f7b88cfa0b965ef81a57f056
Reviewed-on: https://go-review.googlesource.com/102955Reviewed-by: Rob Pike <r@golang.org>

When snapshotting the execution time stats of a goroutine
we take into account the intermediate values kepts in the GDesc's
gdesc field. At the end of goroutine analysis, we go through all
goroutines and replace the GExecutionStat with the new snapshot.
Here the mistake was that we replaced the GExecutionStat with
the value that reflects the intermediate values, but did clear
the intermediate values. So, when the following finalizeActiveSpans
runs, it trieds to add the intermediate values again (double-counting)
when taking a snapshot.

Fix the issue by using the finalized GExecutionStat instead of
recomputing the snapshot. While we are here, refactor the finalization
logic so it can be used when processing GoEnd, GoStop events.

Change-Id: Ibdb342214c29b65d4ea37e52b1f8b83f1fb20143
Reviewed-on: https://go-review.googlesource.com/103157Reviewed-by: Peter Weinberger <pjw@google.com>

Fixes #24132


name                     old time/op    new time/op    delta
BinaryTree17-8              2.18s ± 2%     2.15s ± 2%  -1.28%  (p=0.000 n=25+26)
Fannkuch11-8                2.16s ± 3%     2.13s ± 3%  -1.54%  (p=0.000 n=27+30)
FmtFprintfEmpty-8          29.9ns ± 3%    29.6ns ± 3%  -1.08%  (p=0.001 n=29+26)
FmtFprintfString-8         53.6ns ± 2%    54.0ns ± 4%    ~     (p=0.193 n=28+29)
FmtFprintfInt-8            56.8ns ± 3%    57.0ns ± 3%    ~     (p=0.330 n=29+29)
FmtFprintfIntInt-8         85.3ns ± 2%    85.8ns ± 3%  +0.56%  (p=0.042 n=30+29)
FmtFprintfPrefixedInt-8    94.1ns ± 5%    99.0ns ± 8%  +5.20%  (p=0.000 n=27+30)
FmtFprintfFloat-8           183ns ± 4%     182ns ± 3%    ~     (p=0.619 n=30+26)
FmtManyArgs-8               369ns ± 2%     369ns ± 2%    ~     (p=0.748 n=27+29)
GobDecode-8                4.78ms ± 2%    4.75ms ± 1%    ~     (p=0.051 n=28+27)
GobEncode-8                4.06ms ± 3%    4.07ms ± 3%    ~     (p=0.781 n=29+30)
Gzip-8                      178ms ± 2%     177ms ± 2%    ~     (p=0.171 n=29+30)
Gunzip-8                   28.2ms ± 7%    28.0ms ± 4%    ~     (p=0.155 n=30+30)
HTTPClientServer-8         71.5µs ± 3%    71.3µs ± 1%    ~     (p=0.913 n=25+27)
JSONEncode-8               9.71ms ± 5%    9.86ms ± 4%  +1.55%  (p=0.015 n=28+30)
JSONDecode-8               38.8ms ± 2%    39.3ms ± 2%  +1.41%  (p=0.000 n=28+29)
Mandelbrot200-8            3.47ms ± 6%    3.44ms ± 3%    ~     (p=0.183 n=28+28)
GoParse-8                  2.55ms ± 2%    2.54ms ± 3%  -0.58%  (p=0.003 n=27+29)
RegexpMatchEasy0_32-8      66.0ns ± 5%    65.3ns ± 4%    ~     (p=0.124 n=30+30)
RegexpMatchEasy0_1K-8       152ns ± 2%     152ns ± 3%    ~     (p=0.881 n=30+30)
RegexpMatchEasy1_32-8      62.9ns ± 9%    62.7ns ± 7%    ~     (p=0.717 n=30+30)
RegexpMatchEasy1_1K-8       263ns ± 3%     263ns ± 4%    ~     (p=0.909 n=30+29)
RegexpMatchMedium_32-8     93.4ns ± 3%    89.3ns ± 2%  -4.32%  (p=0.000 n=29+29)
RegexpMatchMedium_1K-8     27.5µs ± 3%    27.1µs ± 2%  -1.46%  (p=0.000 n=30+27)
RegexpMatchHard_32-8       1.33µs ± 3%    1.31µs ± 3%  -1.50%  (p=0.000 n=27+28)
RegexpMatchHard_1K-8       39.4µs ± 2%    39.1µs ± 2%  -0.54%  (p=0.027 n=28+28)
Revcomp-8                   274ms ± 4%     276ms ± 2%  +0.67%  (p=0.048 n=29+28)
Template-8                 45.1ms ± 5%    44.6ms ± 7%  -1.22%  (p=0.029 n=30+29)
TimeParse-8                 227ns ± 3%     224ns ± 3%  -1.25%  (p=0.000 n=28+27)
TimeFormat-8                248ns ± 3%     245ns ± 3%  -1.33%  (p=0.002 n=30+29)
[Geo mean]                 36.6µs         36.5µs       -0.32%


Change-Id: I24083f0013506b77e2d9da99c40ae2f67803285e
Reviewed-on: https://go-review.googlesource.com/101076
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

The additions were machine-generated.

The change for x * 7 avoids a reg-reg move,
reducing the number of instructions from 3 to 2.

Change-Id: Ib002e39f29ca5e46cfdb8daaf87ddc7ba50a17e5
Reviewed-on: https://go-review.googlesource.com/102395
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

If the character after $ cannot be detected as a valid
variable declaration, do not gobble the $.

Fixes #24345

Change-Id: Iec47be1f2e4f8147b8ceb64c30778eae8045b58f
Reviewed-on: https://go-review.googlesource.com/103055
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change reduces the time to run this test on my machine from

real	0m2.491s
user	0m3.020s
sys	0m0.331s

to

real	0m0.237s
user	0m0.180s
sys	0m0.173s

This will make it reasonable to add more constants to the test.
I am also hopeful that it might help a bit with intermittent
cmd/compile/internal/gc test timeouts on the build dashboard
on the slower builders.

The time savings are entirely in compilation time,
by avoiding generating one giant func main.
Instead, generate tables of tests to be run,
which are translated into static data,
and then loop over those tests.

While we're here, do some minor cleanup:

* Remove the _ssa suffix on function names,
  as that was only needed during ssa bootstrapping.
* Clean up error handling during test generation.
* Make functions single-line, to reduce future diff sizes.
  Diffing giant files is slow.

Change-Id: Ic5fccdb71679169bea756c7d33c07d05e4801860
Reviewed-on: https://go-review.googlesource.com/102956
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

This change makes `-m -m` print a better explanation for the case
where a slice is marked as escaping and heap-allocated because it
has a non-constant len/cap.

Fixes #24578

Change-Id: I0ebafb77c758a99857d72b365817bdba7b446cc0
Reviewed-on: https://go-review.googlesource.com/102895Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>

Use internal/cpu instead.

Change-Id: I8670440389cbd88951fee61e352c4a10ac7eee6e
Reviewed-on: https://go-review.googlesource.com/102737
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #23937

Change-Id: Ie63d91355d1a724d0012d99d457d939deeeb8d3e
Reviewed-on: https://go-review.googlesource.com/102818
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

When parsing an ECDSA certificate, improve the error message upon
failing to parse the curve as a named curve, rather than returning
the original ASN1 error.

Fixes #21502

Change-Id: I7ae7b3ea7a9dcbd78a9607f46f5883d3193b8367
Reviewed-on: https://go-review.googlesource.com/57050Reviewed-by: Filippo Valsorda <filippo@golang.org>

Fixes #24526

Change-Id: I0e38322fca12f9c88db836776920b9dfb66ff844
Reviewed-on: https://go-review.googlesource.com/102423Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>

Don't compile the runtime packages with coverage when using the race
detector. The user can, perhaps accidentally, request coverage for the
runtime by using -coverpkg=all. If using the race detector, the
runtime package coverage will call into the race detector before it
has been initialized. This will cause the program to crash
mysteriously on startup.

Fixes #23882

Change-Id: I9a63867a9138797d8b8afb0856ae21079accdb27
Reviewed-on: https://go-review.googlesource.com/94898
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

parsePrivateKey can't return useful error messages because it does trial
decoding of multiple formats.  Try ParseCertificate first in case it
offers a useful error message.

Fixes #23591

Change-Id: I380490a5850bee593a7d2f584a27b2a14153d768
Reviewed-on: https://go-review.googlesource.com/90435
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>

Fixes #24540

Change-Id: I65e9f2f99403e22d25ea64cc26701bf62a31d070
Reviewed-on: https://go-review.googlesource.com/102699
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #24389
Fixes #24396

Change-Id: I37399528700e2a39d9523d7c41bdc929618eb095
Reviewed-on: https://go-review.googlesource.com/102619Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This CL implements Exp and Exp2 with arm64 assembly. By inlining Ldexp and
using fused instructions(fmadd, fmsub, fnmsub), this CL helps to improve
the performance of functions Exp, Exp2, Sinh, Cosh and Tanh.

Benchmarks:
name                   old time/op  new time/op  delta
Cosh-8                  138ns ± 0%    96ns ± 0%  -30.72%  (p=0.008 n=5+5)
Exp-8                   105ns ± 0%    58ns ± 0%  -45.24%  (p=0.000 n=5+4)
Exp2-8                  100ns ± 0%    57ns ± 0%  -43.21%  (p=0.008 n=5+5)
Sinh-8                  139ns ± 0%   102ns ± 0%  -26.62%  (p=0.008 n=5+5)
Tanh-8                  134ns ± 0%   100ns ± 0%  -25.67%  (p=0.008 n=5+5)

Change-Id: I7483a3333062a1d3525cedf3de56db78d79031c6
Reviewed-on: https://go-review.googlesource.com/86615
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Change-Id: Ib67a61d5b37af210ff15d60d72bd5238b9c2d0ca
Reviewed-on: https://go-review.googlesource.com/94815
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

1. STPW stores the lower 32-bit words of a pair of registers to memory.
2. LDPW loads two 32-bit words from memory, zero extends them to 64-bit,
and then copies to a pair of registers.
3. LDPSW does the same as LDPW, except a sign extension.

This CL implements those 3 instructions and adds test cases.

Change-Id: Ied9834d8240240d23ce00e086b4ea456e1611f1a
Reviewed-on: https://go-review.googlesource.com/99956
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Spans are represented using Async Event types of chrome trace viewer.
According to the doc, the 'id' should be unique within category, scope.

https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#heading=h.jh64i9l3vwa1

Use the index in the task's span slice as the slice id, so it
can be unique within the task. The scope is the task id which
is unique.

This fixes a visualization bug that caused incorrect or missing
presentation of nested spans.

Change-Id: If1537ee00247f71fa967abfe45569a9e7dbcdce7
Reviewed-on: https://go-review.googlesource.com/102697Reviewed-by: Heschi Kreinick <heschi@google.com>

No need to sign extend input to Neg8 and Neg16.

Change-Id: I7896c83c9cdf84a34098582351a4aabf61cd6fdd
Reviewed-on: https://go-review.googlesource.com/102675
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

In expandmeth, we call expand1/expand0 to build a list of all
candidate methods to promote, and then we use dotpath to prune down
which names actually resolve to a promoted method and how.

However, previously we still computed "followsptr" based on the
expand1/expand0 traversal (which is depth-first), rather than
dotpath (which is breadth-first). The result is that we could
sometimes end up miscomputing whether a particular promoted method
involves a pointer traversal, which could result in bad code
generation for method trampolines.

Fixes #24547.

Change-Id: I57dc014466d81c165b05d78b98610dc3765b7a90
Reviewed-on: https://go-review.googlesource.com/102618Reviewed-by: Robert Griesemer <gri@golang.org>

Prevent queries from starting a goroutine if the context is
not able to be canceled.

Fixes #23879

Change-Id: I392047bd53d7f796219dd12ee11b07303658fdaf
Reviewed-on: https://go-review.googlesource.com/102478
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Yasuhiro MATSUMOTO <mattn.jp@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

name      old time/op       new time/op       delta
Template        281ms ± 2%        282ms ± 3%    ~     (p=0.428 n=19+20)
Unicode         138ms ± 6%        138ms ± 7%    ~     (p=0.813 n=19+20)
GoTypes         901ms ± 2%        895ms ± 2%    ~     (p=0.050 n=19+20)
Compiler        4.25s ± 1%        4.23s ± 1%  -0.31%  (p=0.031 n=19+18)
SSA             9.77s ± 1%        9.78s ± 1%    ~     (p=0.512 n=20+20)
Flate           187ms ± 3%        187ms ± 4%    ~     (p=0.687 n=20+19)
GoParser        224ms ± 4%        222ms ± 3%    ~     (p=0.301 n=20+20)
Reflect         576ms ± 2%        576ms ± 2%    ~     (p=0.620 n=20+20)
Tar             262ms ± 3%        263ms ± 3%    ~     (p=0.599 n=19+18)
XML             322ms ± 4%        322ms ± 2%    ~     (p=0.512 n=20+20)

name      old user-time/op  new user-time/op  delta
Template        403ms ± 3%        399ms ± 5%    ~     (p=0.149 n=17+20)
Unicode         217ms ±12%        217ms ± 9%    ~     (p=0.883 n=20+20)
GoTypes         1.24s ± 3%        1.24s ± 3%    ~     (p=0.718 n=20+20)
Compiler        5.90s ± 3%        5.84s ± 5%    ~     (p=0.217 n=18+20)
SSA             14.0s ± 6%        14.1s ± 5%    ~     (p=0.235 n=19+20)
Flate           253ms ± 6%        254ms ± 5%    ~     (p=0.749 n=20+19)
GoParser        309ms ± 7%        307ms ± 5%    ~     (p=0.398 n=20+20)
Reflect         772ms ± 3%        771ms ± 3%    ~     (p=0.901 n=20+19)
Tar             368ms ± 5%        369ms ± 8%    ~     (p=0.429 n=20+20)
XML             435ms ± 5%        434ms ± 5%    ~     (p=0.841 n=20+20)

name      old alloc/op      new alloc/op      delta
Template       39.0MB ± 0%       38.9MB ± 0%  -0.21%  (p=0.000 n=20+19)
Unicode        29.0MB ± 0%       29.0MB ± 0%  -0.03%  (p=0.000 n=20+20)
GoTypes         116MB ± 0%        115MB ± 0%  -0.33%  (p=0.000 n=20+20)
Compiler        498MB ± 0%        496MB ± 0%  -0.37%  (p=0.000 n=19+20)
SSA            1.41GB ± 0%       1.40GB ± 0%  -0.24%  (p=0.000 n=20+20)
Flate          25.0MB ± 0%       25.0MB ± 0%  -0.22%  (p=0.000 n=20+19)
GoParser       31.0MB ± 0%       30.9MB ± 0%  -0.23%  (p=0.000 n=20+17)
Reflect        77.1MB ± 0%       77.0MB ± 0%  -0.12%  (p=0.000 n=20+20)
Tar            39.7MB ± 0%       39.6MB ± 0%  -0.17%  (p=0.000 n=20+20)
XML            44.9MB ± 0%       44.8MB ± 0%  -0.29%  (p=0.000 n=20+20)

name      old allocs/op     new allocs/op     delta
Template         386k ± 0%         385k ± 0%  -0.28%  (p=0.000 n=20+20)
Unicode          337k ± 0%         336k ± 0%  -0.07%  (p=0.000 n=20+20)
GoTypes         1.20M ± 0%        1.20M ± 0%  -0.41%  (p=0.000 n=20+20)
Compiler        4.71M ± 0%        4.68M ± 0%  -0.52%  (p=0.000 n=20+20)
SSA             11.7M ± 0%        11.6M ± 0%  -0.31%  (p=0.000 n=20+19)
Flate            238k ± 0%         237k ± 0%  -0.28%  (p=0.000 n=18+20)
GoParser         320k ± 0%         319k ± 0%  -0.34%  (p=0.000 n=20+19)
Reflect          961k ± 0%         959k ± 0%  -0.12%  (p=0.000 n=20+20)
Tar              397k ± 0%         396k ± 0%  -0.23%  (p=0.000 n=20+20)
XML              419k ± 0%         417k ± 0%  -0.39%  (p=0.000 n=20+19)

Change-Id: Ic7ec3614808d9892c1cab3991b996b7a3b8eff21
Reviewed-on: https://go-review.googlesource.com/102676
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

Decode AT_PAGESZ to determine physPageSize on netbsd.

Also rename vdso_none.go to auxv_none.go which matches its purpose more
closely.

Akin to CL 99780 which did the same for freebsd.

Change-Id: Iea4322f861ff0f3515e9051585dbb442f024326b
Reviewed-on: https://go-review.googlesource.com/102677
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change adds a better implementation in asm for addVW/subVW for
ppc64x, with speedups up to 3.11x.

benchmark                    old ns/op     new ns/op     delta
BenchmarkAddVW/1-16          6.87          5.71          -16.89%
BenchmarkAddVW/2-16          7.72          5.94          -23.06%
BenchmarkAddVW/3-16          8.74          6.56          -24.94%
BenchmarkAddVW/4-16          9.66          7.26          -24.84%
BenchmarkAddVW/5-16          10.8          7.26          -32.78%
BenchmarkAddVW/10-16         17.4          9.97          -42.70%
BenchmarkAddVW/100-16        164           56.0          -65.85%
BenchmarkAddVW/1000-16       1638          524           -68.01%
BenchmarkAddVW/10000-16      16421         5201          -68.33%
BenchmarkAddVW/100000-16     165762        53324         -67.83%
BenchmarkSubVW/1-16          6.76          5.62          -16.86%
BenchmarkSubVW/2-16          7.69          6.02          -21.72%
BenchmarkSubVW/3-16          8.85          6.61          -25.31%
BenchmarkSubVW/4-16          10.0          7.34          -26.60%
BenchmarkSubVW/5-16          11.3          7.33          -35.13%
BenchmarkSubVW/10-16         19.5          18.7          -4.10%
BenchmarkSubVW/100-16        153           55.9          -63.46%
BenchmarkSubVW/1000-16       1502          519           -65.45%
BenchmarkSubVW/10000-16      15005         5165          -65.58%
BenchmarkSubVW/100000-16     150620        53124         -64.73%

benchmark                    old MB/s     new MB/s     speedup
BenchmarkAddVW/1-16          1165.12      1400.76      1.20x
BenchmarkAddVW/2-16          2071.39      2693.25      1.30x
BenchmarkAddVW/3-16          2744.72      3656.92      1.33x
BenchmarkAddVW/4-16          3311.63      4407.34      1.33x
BenchmarkAddVW/5-16          3700.52      5512.48      1.49x
BenchmarkAddVW/10-16         4605.63      8026.37      1.74x
BenchmarkAddVW/100-16        4856.15      14296.76     2.94x
BenchmarkAddVW/1000-16       4883.96      15264.21     3.13x
BenchmarkAddVW/10000-16      4871.52      15380.78     3.16x
BenchmarkAddVW/100000-16     4826.17      15002.48     3.11x
BenchmarkSubVW/1-16          1183.20      1423.03      1.20x
BenchmarkSubVW/2-16          2081.92      2657.44      1.28x
BenchmarkSubVW/3-16          2711.52      3632.30      1.34x
BenchmarkSubVW/4-16          3198.30      4360.30      1.36x
BenchmarkSubVW/5-16          3534.43      5460.40      1.54x
BenchmarkSubVW/10-16         4106.34      4273.51      1.04x
BenchmarkSubVW/100-16        5213.48      14306.32     2.74x
BenchmarkSubVW/1000-16       5324.27      15391.21     2.89x
BenchmarkSubVW/10000-16      5331.33      15486.57     2.90x
BenchmarkSubVW/100000-16     5311.35      15059.01     2.84x

Change-Id: Ibaa5b9b38d63fba8e01a9c327eb8bef1e6e908c1
Reviewed-on: https://go-review.googlesource.com/101975Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>